43161123 has 4 divisors (see below), whose sum is σ = 57548168. Its totient is φ = 28774080.

The previous prime is 43161119. The next prime is 43161149. The reversal of 43161123 is 32116134.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 43161123 - 2² = 43161119 is a prime.

It is a super-2 number, since 2×43161123² = 3725765077242258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43161123.

It is not an unprimeable number, because it can be changed into a prime (43163123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7193518 + ... + 7193523.

It is an arithmetic number, because the mean of its divisors is an integer number (14387042).

Almost surely, 2^43161123 is an apocalyptic number.

43161123 is a deficient number, since it is larger than the sum of its proper divisors (14387045).

43161123 is a wasteful number, since it uses less digits than its factorization.

43161123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14387044.

The product of its digits is 432, while the sum is 21.

The square root of 43161123 is about 6569.7125507894. The cubic root of 43161123 is about 350.7768404789.

Adding to 43161123 its reverse (32116134), we get a palindrome (75277257).

The spelling of 43161123 in words is "forty-three million, one hundred sixty-one thousand, one hundred twenty-three".